<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
  <link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/css/bootstrap.css">

  <style media="screen">
    .btn.btn-primary {
      background-color: #a20;
      border-color: #a20;
    }

    .container-small {
      max-width: 500px;
    }
  </style>
<div class="container container-small">


  <h1>登录</h1>
  <form  action="index.html" method="post">

    <div class="alert alert-success">
      登陆成功~ 正在跳转...
    </div>

    <div class="form-group">
      <label for="">用户名</label>
      <input type="text" class="form-control" name="" value="">
    </div>

    <div class="form-group">
      <label for="">密码</label>
      <input type="password" class="form-control" name="" value="">
    </div>

    <div class="form-group">
      <button type="submit" class="btn btn-primary btn-block" name="button">登录</button>
    </div>
  </form>
</div>
</body>
</html>
